Brown discharge in early pregnancy may be a normal phenomenon, but it does not exclude pathological causes such as ectopic pregnancy, cervical columnar epithelial ectasia, preeclampsia and other causes. 1. Normal phenomenon: after the embryo is implanted, a small amount of bleeding occurs due to the localized destruction of the endometrium, and then brown discharge appears. Usually after 2-3 days, the endometrium will be repaired and the bleeding will stop, which is normal. 2. Ectopic pregnancy: the patient may be due to ectopic pregnancy, when the fertilized egg gradually develops, it may lead to the compression of the surrounding tissues, so that the damaged parts bleed, thus appearing the phenomenon of brown discharge in early pregnancy. 3. Cervical columnar epithelial ectasia: If pregnant women have unhealthy living habits, hormonal disorders and other conditions, cervical columnar epithelial ectasia may occur, triggering bleeding, and ultimately the emergence of brown discharge in early pregnancy. 4. Pre-eclampsia: The patient may have a pre-eclampsia due to strenuous exercise or exertion, which may cause uterine bleeding and the appearance of brown discharge in early pregnancy. So if a pregnant woman has brown discharge in early pregnancy, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, to clarify the cause of the disease, symptomatic treatment.